CGI stopped working on setting Nginx as reverse proxy for apache

So I am running a site www.example.com. Initially, I was using apache and any hit to my site would be redirected to www.example.com/path. Now this redirection is defined in my httpd.conf like:

Redirect 301 /index.html http://www.example.com/path

and my VirtualHost setting for this domain looks like this:

<VirtualHost 1.1.1.1:80>
    DirectoryIndex  index.php index.html index.htm index.shtml
    ServerAdmin root@www.example.com
    DocumentRoot "/var/www/html"
    ServerName www.example.com

    ScriptAlias /path "/path/to/cgi/script"

</VirtualHost>

So basically when someone visits www.example.com, he is redirected to www.example.com/path which is executes a CGI script as defined by the ScriptAlias directive.

Everything was working fine until I had to do the following:

Install nginx and configured it to act as a reverse proxy for apache.

Now nginx listens to port 80 and apache listens to 8080. I made the changes in httpd.conf file accordingly.

Listen 8080

and

<VirtualHost 1.1.1.1:8080>

Now when someone tries to go to www.example.com, he is redirected to www.example.com/path but the script does not seem to execute. I am getting the following error on my web page:

Not Found

The requested URL /path was not found on this server.
Apache/2.4.25 (Unix) PHP/7.0.16 SVN/1.7.14 Server at www.example.com Port 80

The fact that it is redirecting tells me that the request from nginx to apache is working fine. There must be something wrong CGI execution. В журналах ошибок apache и nginx ничего нет.

Я этого не понимаю. С apache все работало нормально, но теперь, когда запрос достигает apache, что-то ломается.